What are Global Address Lists?

The Global Address List (GAL) in Microsoft Exchange is a comprehensive, centrally-managed directory of all users and resources within an organization.

  • Includes users, email addresses, meeting rooms, and more
  • Admins can create additional GALs by department or location
  • Each user only sees their assigned GAL

Why it matters: The GAL keeps your workforce and resources accessible, streamlining collaboration in Microsoft Outlook and beyond.

What is Global Address List Synchronization?

GAL synchronization means automatically updating and replicating contact and resource information across multiple Exchange servers or organizations' GALs—no more manual copying or errors.

Why Synchronize the GAL?

  • Unifies contact info across companies or cloud tenants
  • Keeps every user’s address book up to date—automatically
  • Saves time, reduces IT effort, and eliminates mistakes

With CB GAL Sync, your teams always have the right contacts at their fingertips—no matter how complex your organization.

How Does the GAL Work in Outlook?

When you compose a new message and click To, Cc, or Bcc, Outlook shows your default address book—usually your organization's GAL.

  • Search by name in the GAL's search box
  • Pick from instantly returned contacts
  • Just double-click to add the recipient
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Real-world Use Cases

Mergers and Acquisitions

The existing companies before the M&A process had separate Exchange tenants.

After the M&A, each company wants to share with others the Global Address List contacts.

This way, end users can easily access the Global Address List in Outlook when creating an email to a colleague.

Partners

Two companies work as partners but have separate Exchange tenants, resulting in different email environments.

They want to streamline the mailbox search process for their users.

With CB GAL Sync, they search for mailboxes in either company by just typing and searching in the To field in Microsoft Outlook.

Group of Companies

Companies that belong to the same group but have separate Exchange environments want to have the same Global Address List (GAL) across the whole group of companies.

This way, users across all companies will be able to access a single, up-to-date directory of contacts in Outlook without anyone having to maintain and update individual address books manually.

How Does the GAL Work in Outlook?

Unify your organization: Seamlessly synchronize Global Address Lists (GALs) between two Exchange organizations, Office 365 tenants, domains, or forests.

Always up to date: Ensure every team member can access the latest contact details and resources across boundaries, with no manual exports or imports.

Flexible integration: Supports both on-premises and cloud deployments for hassle-free syncing, regardless of your environment

How to Get Started with CB GAL Sync

Step 1

Step one
Deploy the solution
Choose your two Exchange Servers – these can be online or on-premises, both are supported

Step 2

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Select your environments & attributes:
Choose which objects and attributes you want to synchronize within the Global Address List. We support user mailboxes, mailbox contacts, and room mailboxes.

Step 3

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Automatic synchronization

The GAL Sync add-on will automatically synchronize the Global Address List on the two servers whenever changes occur. 

Ready to See What This Can Do for You?

Are you eager to see all this in action? We can schedule a brief web meeting to give you an interactive live demo.

Schedule a Free Consultation

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